19885775

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8741}}^1$

素因数の和:8771

約数の個数: 24

約数和(自身を含む): 30352224

約数和(自身を除く): 10466449

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8741, 43705, 61187, 113633, 218525, 305935, 568165, 795431, 1529675, 2840825, 3977155, 19885775]

約数ペア:

[(1, 19885775), (5, 3977155), (7, 2840825), (13, 1529675), (25, 795431), (35, 568165), (65, 305935), (91, 218525), (175, 113633), (325, 61187), (455, 43705), (2275, 8741)]